clang/test/SemaCXX/operator-arrow-depth.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s -DMAX=128 -foperator-arrow-depth=128
   2 // RUN: %clang_cc1 -fsyntax-only -verify %s -DMAX=2 -foperator-arrow-depth=2
   3 // RUN: %clang -fsyntax-only -Xclang -verify %s -DMAX=10 -foperator-arrow-depth=10
   4
   5 template<int N> struct B;
   6 template<int N> struct A {
   7   B<N> operator->(); // expected-note +{{'operator->' declared here produces an object of type 'B<}}
   8 };
   9 template<int N> struct B {
  10   A<N-1> operator->(); // expected-note +{{'operator->' declared here produces an object of type 'A<}}
  11 #if MAX != 2
  12   // expected-note-re@-2 {{(skipping {{120|2}} 'operator->'s in backtrace)}}
  13 #endif
  14 };
  15
  16 struct X { int n; };
  17 template<> struct B<1> {
  18   X *operator->();
  19 };
  20
  21 A<MAX/2> good;
  22 int n = good->n;
  23
  24 B<MAX/2 + 1> bad;
  25 int m = bad->n; // expected-error-re {{use of 'operator->' on type 'B<{{2|10|128}} / 2 + 1>' would invoke a sequence of more than {{2|10|128}} 'operator->' calls}}
  26                 // expected-note@-1 {{use -foperator-arrow-depth=N to increase 'operator->' limit}}